Bump @changesets/changelog-github from 0.4.0 to 0.4.8

Bumps [@changesets/changelog-github](https://github.com/changesets/changesets) from 0.4.0 to 0.4.8.
- [Release notes](https://github.com/changesets/changesets/releases)
- [Changelog](https://github.com/changesets/changesets/blob/main/docs/modifying-changelog-format.md)
- [Commits](https://github.com/changesets/changesets/compare/@changesets/changelog-github@0.4.0...@changesets/changelog-github@0.4.8)

---
updated-dependencies:
- dependency-name: "@changesets/changelog-github"
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>